Calculating machine



Apnl 21, 1925.

Filed May 24, 1924 Patented Apr. 21, 1925.

UNITED STATES PATENT OFFICE.

CHARLES FELICIEN BLACHER, OF'IBARNET, ENGLAND, ASSIGNOR '10 GUYS CALCULAT- ING MACHINES LIMITED, OF LONDON, ENGLAND.

CALCULATING MACHINE.

Application filed May 24, 1924.

To all whom it may concern:

Be it known that I, CHAnLns F ELICIEN BLAorrnR, a subject of the King of England, 7 residing at Barnet, Hertfordshire, England, have invented certain new and useful Improvements in Calculating Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art- 10 to which it appertains to make and use the same.

This invention relates to calculating machines of the pin wheel and cam disc type, and has for its object to provide an improved form of transfer mechanism for effecting the carry-over to a higher denomination in the lower numeral drums or totalizer counters of such apparatus.

.. In calculating machines of the above mentioned type it is well known to actuate the counting wheel through a ten-carrying slider adapted to project into the path of transfer pin teeth upon the pin wheel, the slider being slotted to move upon guiding shafts and being returned by a cam upon the pin wheel. Such sliders, however, have hitherto required separate detent or retaining devices and in some cases the slider and detent occupy so much space when interposed between adjacent numeral drums or recording wheels, that it is impossible to providea compact carriage.

According to the present invention, a slider of the above type is made integral with a locking and localizing device; the latter is so formed that the forward and return strokes of the slider are completed and stopped by spring jaws which can be sprung apart but which positively grip one 40 of the guide shafts at the end of each stroke.

Thus the slider is definitely located in each position. The slider is preferably so shaped that the guiding slots are on opposite sides of the shaft carrying the numeral drums, so

that the slider is guided at each' end of its length.

The invention is hereafter described with reference to the accompanying drawings, in which Figure l is a sectional elevation showing the improved transfer mechanism.

Figure 2 is a detail as viewed from the right of Figure 1.

Figures 3, 4 and 5 represent the slidable member employed to effect the transfer.

Serial No. 715,500.

A calculating machine of the pin-wheel and cam disc type comprises as is well known to those skilled in the art a plurality of pin-wheel and cam disc pairs arranged side by side upon a supporting shaft; it also comprises a plurality of numeral drums or totalizer counters, also arranged side by side and usually at a lower level for convenience in reading off the product or dividend. In the drawings, I have not illustrated the complete sets of pin wheel and cam disc members, nor of numeral drums, but for the sake of simplicity I have shown only sufficient for explaimng the transfer or carry-over from one digit to another by means of my improved mechanism.

' A pin wheel at is shown in Figure 1 with two transfer teeth al d and the cam or swell g lying between them. On one lateral face of each pin Wheel member there is formed a part-annular recess or shoulder g the extremities of which are curved outwardly at so as to terminate at the periphery of the pin wheel; the curved surfaces 9 together with the art-cylindrical surface comprised between t e points at which they merge into the periphery of the pin wheel (1 constitute the swell or cam g. The angular extent of the cam g varies in successive pin wheels in accordance .With the setting of the transfer teeth on, the particular pin wheel. One or other of these transfer teeth comes into operation as required during the rotation of the pinwheel in the forward or the backward direction, for multiplication or addition or for division or subtraction respectively, as is well known.

One of the numeral drums is shown at 6, this drum being revolved in the usual manner by the intermeshing pinions e and f, when operated by the rotation of the pin :yheel, according to the setting of the cam isc.

A stationary spindle h, which may carry the pawls k controlling the totalizer pinions f, is located diametrically opposite to the spindle 2' of the intermediate pinions, in relation to the numeral drums.

The slider c, as seen in Figure 2, is mounted between the numeral drum 6 and the pinions e f of next higher denomination; at one end this member is provided with a cam nose 0 and it is guided at that end by means of a longitudinal slot 0 through which the spindle i of the intermediate pinions is passed, while its other end is guided in'the same longitudinal directlon by means of the stationary spindle h; To, produce a definite location in either of its twojpositions, this end of theslider is shown formed with spring. jaws'ic i' having two pairs of notches adapted to grip the guide-bar h but adapted to be sprung apart to allow the sliding movement vwhen the transfer mechanism is to be actuated.

5 The camjnose c of the slider is shaped as represented in Figures 3, 4 and 5,130 provide laterally bevelled faces 0* over which. the transfer tooth al or (Z rides as. the pin wheel' r otates, anda rounded end 0 which is engaged by the swellg upon the pin wheel, so, asto push the slider back .to its lower-position, as hereafterdescribed.

Betweenthe spring jaws and the slotted portion: which carries the cam-nosec the slider is formed in a loop 0 having its sides bowed outwards concentrically with the nu-: meral'ldrum's; the unction'of the bows with into the path of the transfer tooth d or d on the pin-wheel, hen the pin wheels arefne'Xt rotated this tooth encounters the bevelled face 0* of the projecting cam (see Figures 3 and i), andflit is moved aside so as" to engagethe intermediate ,pinionc of the adjacent pair thereby rotating the. numeral'drum- Z)" of higher denomination through the requiredffraction of a' revolir tion. Afterthetransfer tooth has thus op-j erated'ithe ipinion. c, it moves clear ofthe cam noseupon the slider v(see Figure 5), and the curved surfaceg of the cam ;7 comes into. engagement with the rounded end of the slider, pushing the latter back to'the pos'itio'n'shown. in Figure 1.

The slider may be madeo-f thin spring metal, such as'steel, so that the' bows, cam and j aws can conveniently'be fitted between the numeral drum and the pinion of the next drum and thejprojecting end 0 which engages the transfer teeth thickened up for example by hollow-pressing to provide for the bevelling of the edges 0*, and'if desired for the slotting of the guide portions. The extremity 0 which is'engaged by'the swell g on the; pin wheel is offset from the plane of the loop cfl'and brought towardsthe centre line of thenumeral drum as seen 111- Fi'g-ure- 2. Thus the transfer teeth normally. rotate in a plarie lying between the nose 0 and the adjacent pinion, 6, but when the slider is advanced to effect the transfer, the bevelled faces 0* move into the path of the transfer'teeth in this same plane, and cause a. lateral deflection i into the plane of "the pinion e of the next higher denomination. Transfers to or from several higher denominations take place successively owing to the helical or spiral setting of the several transfer teeth on the respective pin wheels, in the well known way.. I 7

,Having thus. described my iinvention, whatI clailnis z i '1; In a calculating machine of the pin wheel and. cam disc type, a longitudinally movable transfer slider which is provided integrally with means for locking and localizing saidmovable slider in either of its eX- trellis-positions. V

f 2. In a calculating machine of. the pin wheel and cam disc type, the combination of a a' slotted longitudinally movable slider, a coui'iting- Wheel and meansfor actuating said wheel by the rotation of said pin wheel, said slider being adapted to'project into the path of. the transfer pin teethfupon said pin wheel, and guiding shafts for said slider, which pass transversely through the slots in said slider, said slider hav ng. one end formed with spring jaws adapted to grip a guiding shaft in each of the extreme positions of'the sliders. V r i j 3, In ea calci'ilati'ng'machine of the pin wheel and cam disc type, a longitudinally movable, slotted transfer slider,- a counting wheel and means foractuat'ingsaid wheel. by the rotation of said pin wheel, guide shafts for saidslider 'which pass through slots in said slider, one 'offsaid'slots, being formed with pairs of angular notches to em brace'o'ne ofthe-saidvguide shafts. I j V 4. In a calculating machine of the pin wheel and cam disc type, a longitudinally movable. transfer-slider, means for advancingsaid slider towards the pin wheel, a'cam upon the pin wheel thereafter moving back said slider, and means for positively lockingthe slider in its extreme positions, said lock.-

ing means being integral with the said trans:

ferslider.

5.In a calculatinglniachine of the pin;

wheel and cam discty pe, a longitudinally movable one pi'ece slider, comprising a loop frame, a camnoseat one'end of the slider, a camp rojecting inwardly of the loopframe and in the same "plane as the loop frame,

outwardly directed spring arms. at the oppo ing atrans'versely arranged guiding shaft, 7

6. In a calculating machine of the pin wheel and cam disc type, a spindle-m0unted numeral drum, a cam projection upon the side of said drum, a one-piece transfer slider having a loop frame adapted to encircle said spindle, a cam nose at one end of said transfer slide adapted to engage an external cam on the pin wheel periphery, laterally bevelled faces upon said cam nose, said faces adapted to engage a transfer tooth on the pin-wheel, a slot between said cam nose and said loop frame, said spring jaws formed at the other end of said transfer slider, said jaws adapted to locate and hold the transfer slider in either of two positions, the interior of said loop frame having an inwardly directed cam adapted to cooperate with said cam projection upon the side of the numeral drum to displace the transfer slider from nose and said loop frame, notched spring jaws at the opposite end of said slider, and parallel spindles arranged transversely of said slider, said guiding slot and notched spring jaws engaging said parallel spindle to guide and locahze said transfer slider.

In testimony whereof I aflix my signature.

CHARLES FELICIEN BLACHER. 

